Question

Which of the followingquadratic equations havex=3 as one of its roots.

(A) x-8x +15=0

(C) x-8x-15=0

(B) x+8x +15=0

(D) x+8x-15=0​

Answer 1

Answer:

Given:

x

2

+8x+15=0

x

2

+8x=−15

x

2

+8x+16=−15+16

x

2

+2×4x+4

2

=1

(x+4)

2

=1

x+4=±1

Hence, x=−4+1=−3 or x=−4−1=−5

Step-by-step explanation:

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Answer 2

d) is correct answer mate

hope it helps......